Okay, So I've noticed that my new betta has a crumbled top fin!!!!! What is up with this!?!? It used to be so beautiful and now .... ugh. Please anyone, let me know if this is something to worry about.

I didn't feel like searching through the forum for anything like this .... I was to lazy. =P

Agree with xxabc, lot of water changes daily for at least 10 days...best medication for fish IMO/E....daily of at least 50% and then stay with regular water change of 50% twice weekly in 6g or less and more in 3g or less with or without filtration......

What size tank is he in? Do you know the pH and hardness of your water? It could be the water is hard and is causing his fin to curl. My old guy Fish has a curled dorsal fin.. I assume its due to the high levels of ammonia he was subjected to most of his life.

Tail curling can be caused by improper water conditions, a small living space or it could be a genetic trait. If it is only a 1 gallon tank it may not uncurl, I bought a betta and he was in a 1 gallon and had curled fins but they fixed themselves once I moved him to a new 3 gallon tank.